Rotary compressor.



No. 845,114. PATENTED FEB. 26, 1907. 0. 0. PALMER.

ROTARY COMPRESSOR.

APPLICATION FILED MARJI, 1905.

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Urutrnn sTAT as PATENT OFFICE.

ROTARY COMPRESSOR.

To all Mill/ 0777 it Tito/y concern:

'Be it known that I, CAssIUs CLAY PAL- "MER, acitizen of the United States, and a resident of New York city, borough of Manhattan, in the county and State of New York, have invented certain new and useful Improvements in Rotary Compressors, of which the following is a specification.

This invention relates to rotary compressors, and consists of certain novel parts and combinations of parts particularly pointed out in the claims concluding this specification.

In the accompanying drawings, Figure 1 is a sectional view-of a compressor embodying my invention, taken on the line 1 1 of lig. 2. Fig. 2 is a sectional view showing the interior of the cylindrical casing. l ig. 5 is a view of one of the heads of the cylinder, showing the same recessed according to my invention.

The drawings illustrate my invention in' the form which is at present preferred by me, although it will be understood that .various changes and modifications may be made in the details of the same without departing from the spiritof my invention and without exceeding the scope of the concluding claims.

Reference beingnow had to the details of construction as illustrated in the several figures, 1 is a cylinder or casing constituting with the heads 2 2 which are suitably secured to the casing by any appropriate meansas, for example, the bolts 3 3, &c. an interior cylindrical chamber 4. This cylinder is bored after the manner described in United States Letters Patent to Gilmer Crowell, No. 475,301 "and No. 475.302, dated May 24, 1892. The shaft 5, passing through the cylindrical. chamber, is journaled eccentrically in the bearings6 6 in the heads 2 2. Secured to the end of the bearing 6 is a cap 7, which incloses the end of the shaft 5. If necessary to prevent leakage, packing 8 of any suitable material may be placed around the shaft. To the other end of the shaft 5 is secured the belt-wheel 9. The outer end of the bearing 6 has aflixed thereto or forming part thereof the cell or chamber 10, surrounding the shaft. To this end of the bearing or to the affixed chamber is suitably secured the cap 11, the head of which has an opening therein adapted to fit snugly around the shaft. A sleeve 12, surrounding the shaft, extends from the cap into and through the chamber 10 and into Specification of Letters Patent. Application filed March 11, 1905. Serial No. 249,584:--

Patented Feb. 26, 1907.

the bearing 6. The chamber orcell 10 is supplied with glycerin or other suitable agent from the reservoir 13, and the sleeve 12 has therein openings 12 whereby the glycerinmay have access to the shaft 5. This chamber 10 thus forms a liquid seal, which I and accumulating within the compressorchamber, and thereby friction is greatly reduced. To further prevent leakage, a suitable packing material 14 may, if desired, be

| placed around the shaft between the end of the sleeve 12 and the interior of the bearing 6?. 15 15 are pipes leading from a suitable source of oil-supply (not shown) to the interior of the bearings 6 and 6 The above matters of detail may, however, be varied, if desired, and also, if necessary, a liquid seal similar to that above described may be placed in or adjacent the bearing 6. a

16 is arotating drum carried by the eccentrically-journaled shaft 5, and said drum carries with it the radially-sliding pistons or blades 17, of which there may be two or more. These blades are adapted to slide in grooves or slots 1 7. and have at their outer ends a packing-strip 18, preferably made of soft steel; but other suitable metal may be used. These ends are adapted in theirrevolutions to preserve accurate and close contact or fit throughout the diameter of the internal caliber without liability of leakage at any point past a blade. That the blades 17 may be practically continuous in a radial line the pins 19 19 are provided, each passing through perforations in the shaft with either end in contact with the end of the piston or blade, there being a. air of pins for each pair of blades,the who e free to slide back and forth with respect to the axis.

20 20 are recesses or channels (shown in the drawings) upon the drum; but these channels may, if preferred, be formed on the heads 2 2 and perform the same function. The purpose of these recesses or channels is to serve as ports whereby the oil may circulate and be transferred from. one guideway 17 for the blade 17 toanother, and therebyluprevents the air from entering the bearings IIO motion. The aim of my invention is to re duce friction and to facilitate the rapid operation of the machine, and by means ofthe channel above described around the drum or in the heads this purpose is accomplished. To further reduce the friction-surface, I groove or recess the heads 2 2, as indicated by'the recesses 21 21, 850. These recesses u on the revolution of the drum become filed with liquid and serve as a liquid seal,

preventing tle gases passing from the vacuum side of the rotary compressor to the compression side.

W at I claim, and desire to secure byLetters' Patent, is

1. In a rotary compressor the combination wit a casing hav'ng the interior faces of the heads thereof foimed with a plurality of grooves, a shal' t extending'through the casin g, a drum mounted upon said shaft, a liquid seal being formed by the grooved heads and the ends of the'drum, said drum also having guideways formed therein, radiallysliding blades reciprocating in said guideways, and means for introducing a lubricant to the guideways of the blades.

2. In a rotary compressor the combination with a casing having the interior faces of the heads thereof formed with a plurality of circular grooves, a shaft extending through u said casing, a drum mounted upon said shaft, and forming a liquid seal with the and means for introducing the lubricant to the grooves in the drum.

In witness whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

CASSIUS CLAY PALMER.

Witnesses:

WALTER, A. PAULING, CHARLES J RATl-lJENi 

